1830 mm (6′ 0″) diam., 18 oval spokes, rectangular inner rim, apparent tread 80 mm.
Hub 15″ face dia., 1″ out from the tyre. Pin in line at 325 mm (12.8").

Source: works drawing.

Casting: 57.2 mm tread dia., 52.2 i/d, hub 0.8 mm out from the tyre, pin at 10.2 mm.

Casting prices and stock . Switzerland loco sets, price list

Scans of a casting in a set for the Jura-Simplon A2/4 class